Rotary pump



Aug. 2s, .1923. 1,466,068

' F. C. SMITH ROTARY PUMP Filed May l0 1921 I To all whom t mayconcern.'

kPaterrtedl il-ing. 28, l923.

hill

ROTARY Punti.

Application eiednay 10,1921. semi 119.468,373. l

Be it known that I FRANK a citizen of the United tates, anda resident ofLos Angeles, in the county of Los.An-

geles and State of California, have invented new vand usefulImprovements Rotary Pumps,.of whlclithe following 1s a speciifv cation.

This invention relates to rotary pumps,

and the main object .is to. provide a simplev `vided in said casingbetween the inner wallA thereof and the impeller, through Awhich ailuidmay be moved as in other types of pumps.

More particularly,.it is an object ofV my invention Vto providein a pumpof the charl acter described, a casing having a cylinder` withdetachable heads, an impeller shaft eccentrically mounted with respectto said cylinder, and -an impeller fixed to said shaft and concentrictherewith, but eccentric with f The heads H and H have bearings 2 andrespect tothe cylinder. It is also an object to provide in the endsofthe cylinder, annular grooves concentrically formed with respect tothe cylinder and, eccentric with respect to the impeller, and one ormoreimpeller blades adjustably sup{ ported onthe impellerand havingtrunnions or other device extending intosaid grooves whereby said blademay be moved inwardly and outwardly from the periphery of the impellerduring the rotation thereof, so as` to maintain permanent contact k,with4the innerperiphery of the cylinder, and thus create suction in thespace between the cylinder periphery and the periphery of the impeller,for inducing a fluid ,into the pumpv and discharging the Sametherefrom.

Other. minor objects w1ll appearv as description. progresses.

Fig. l is a side elevation of my improved' pump. v

Fig. 2 is ai sectional elevation of the same,

on a plate at rightangles to theaxisof tl1e Orrig. 1. l

Fig. 5 is a fragn'ientarT Asection of the pump, shcwing details of t.. estructme;` andi C. SMITH,

thev

Fig. 6 is a fragmentary view of the impeller blade, showing the detailsjthereof. n Briefly described my improvements coin- 4sist of a cylinderC, provided with a base B, detachable cylinder heads H and Hf and animpeller Ioperatively mounted -on a shaft S and having'an adjustablevane A supported thereon for operation within the cylinder. i

The cylinder C has an annular wall l,

ywith flanges f,.f, integrally `formed with said wall, and at fthe endsthereof, an inlet vl at the bottom and anfoutl'et O at the top,

said inletlbeing approximately on the verV 19d-@lt l tical center lineof the cylinder and said .outletfbeing tangentially disposed. relativetosaid cylinden rlhe base B, which may or may not be ,integrallyformedwith the cylinder, butis shownias such, Vmay have ribs 1', r,connectingthe flanges 16,77, wththe basey B, 'or

otherwise formed as, m-ay be desirable or convenient.

The cylinder heads H, and H have flanges f', f', formed thereon,corresponding to and adapted to be attached to the flanges f, on thecylinder C. by means of bolts b.

heads and oneend of said shafty is provided with a driving pulley'Pwhich may be operated from a source of power by means of a'belt 3. rThecentral portions 4, 4, of

the heads are extended inwardly from the flanges f', f, into the bore ofthe cylinder and a. crescent shaped spaceC .is pro- :vided within-saidcylinder between the inner periphery 0fthe kcylinder andthe outerperiphery of the impellerl. This crescent shaped space C5 is due to thefact that the shaft S isv eccentrically mounted in the pump' withrespect to the cylinder C, the .centerY of the cylinder and thecenterfof the shaft -being spaced substantially apart, but it will beunderstood `that the impeller 'l is concentricall-y formed with vrespect to the Shaft s.

The extended portions 4, 4', of the cylinder heads H and H are providedwith annular constitute guides for'the impeller, as-liereimy afterdescribed. The vane A is composed Y of tivosegments a and a integrallyformed.

i cation of power thereto, from the pulley 2".

is arcuate in form, and is laterally disposed relative to the axis ofthe portion 5 of the vane, and jis adapted to seat in a Vcorrespondingly`Aformed recess 8 lin the impeller. At the junction of the portions aand a', the

vane is slightly enlarged, as a't `9, and is fadapted fto receive andhold a bol't 10,:vvhichY in theform of a device shown has a central.enlarged andeccentric portion Ae', With eX- tended ends e', e, whichmay carry rollers R, R. Said rollers correspond in diameter Vto theWidth of the grooves g", and the portions ofthe -boltlO at the Aends ofcentral portion e'may lbe threaded and lprovided Witlinuts N, N,"Whichare adapted-,to seat in recesses l1 1'1 formed in the Jortion 9 of @thevane. Y v f3.5

Thus, it v`Win be possibi@ to, adjust the rollers R, R, relative to thesides of the grooves' g g,'byiturning the bolt Within theLportion9wvhen'thenuts N, N, arev loosened,`

and thereafter vtightening` said nutsfso `asfto hold th'eperipheries ofsaid Vrollers intoclose engagement with the outer sides of said groovesand the outer surface ofthe portion v9'of the'vane, into contact'withthe Wall l..

of thecylinder.

lt Will be understood that l may omit the rollers'R, R, if desirable,and in llieu thereof "form the grooves g, g,l to correspond `With theends e', e vof Vthe bolt l0, and l may also rprovide other means foradjusting the trunnions e', e with respectto'the grooves, and

"the vane A with respect tothe cylinder Wall.

l do not consider this material to my .in'ven-v 'tion and several means`for accomplishingA this resultivill readily appear to one skilled f ein the art.

V"When the shaft S is rotated by the appliand belt '3, the impeller 'lWill rotate `Within ythe cylinder C and move the vane A in a cirj cularpath Within said cylinder, said val-ne being,r adjusted so as vtoclosely contact Withthe inner surface ofthe cylinder wall l,

When-'the impeller lis rotated, and induce a i flow of liquid into thespace C ofthe cylinder, througfl'ifthe' inlet and discharge the`A'liquid through theioutletA O. Pipes 12 and 13 maybe connected'respectively with `the inlet and outlet for delivering the liquid toiandvvconveying the same Yfrom the pump. The" trunnions e', c mounted ontheoutermost .portion ofthe vane A' and operating' in the.

grooves g, (l, serve to maintain a close contact all times betweenVtli`e`vane of .the inner surface of the cylinder Wall.v and` thusprovide ample suction in the cylinder for r ,erforming the functionsofthe pump.V lltY will be apparent that as the impeller and its vane Ais rotated within the cylinder, the vane will gradually move inwardlyand out Wardly with respect to the axis of the im- `peller, and itsposition will be constantly changed. The Aportion a of said vane, asliereinbefore stated, will be correspondingly moved into and out of therecess 8 in the `impeller, as the impelle'r is" rotated.V` `This is `dueto 'the' fact `that the space C, `Within the cylinder is'unchanging as'to its position,

inasmuch as Vthe cylinder C and the impeller voccupyrned positions, andthe position therefor of the space CY is also fixed, 'the relativeposition ofthe impeller and the'cylinder is such as to provide an amplevarea lfor'the inlet and outlet, Vand sofas to eliminate any backpressure which maybe cre! ated. Tothis'endthe outlet O should be ofsuliicient area to .exhaust all yof Athe liquid moved through the-spaceC,-and the upper portion of said *outletis preferably disposed at atangent to the' circle ofthe innersur# 'face Vvofthe cylinder. 'l

In order to Vmake' the proper adjustment for tliervane l may provideopeningswD inthe cylinder heads H and H which may be coveredbydetachable .blades D Aheld rony fthe'hea'ds 'by Vmeans of uscrews or'bolts d.

Thus, it'would be possible .bvremoving the blades to gain accessto theinteriorof'the pump casing for adiusting the bolt ein the vane A; j, Y,p y Y lt will be understood also that the contact between the vane Aandthe inner periphery ofthe cylinder Wall, vvhile as close as possiblein orderto provide a running fit, should not be so closeY as to causeundue Wear on the casing;r and vane.

m ihe several paits of my pump maybe readily assembled andd1sassembled,for'any purposesjand because of lthe factthat there are*no4 springs for holdingthe vane in Vits extended position, little Wearvvill be encountere'chnnd'a close contact should .at all times bemaintained betweenthe abutment and theV cylinder.

l may,Y if desirable, provide a plurality of y the ,vanesA 'andcorrespondingly chantre the 'location of the inlet and outlet, forobtaining,r

the best results.'

v@ther'changes mavvrhe made yWithout departing 'from the sp'iritpfmy'invention'or enlarging the scope ofthe appendedclaim.

W hat l vclaim is: A rotary` pump comprising' a cylindenthe 'casing'having detachable e'nds,'a shaft eccentrically vmountedin-saidycasing"and jour-V naled in said ends, and anL impeller concentrica'lly`mounted `on said shaft and yeccenno Y trically disposed insaid-casingan ,arcuate recess beingf formed in the periphery'of lsaid impelloer, a"vanehavingi a segmental-portion 5Correspending; -iir'widthV to theWidth `of ysaid impeller and pivotally mounted on said im- `peller, asegmental guide portion` on said vane formed on a radius from the axisof said outer portion, and adapted to slidably seat in an arcuate slotin saidimpeller, concentric grooves Jformed in the ends of said casing,trunnions extended from tlie outer portion of said vane, and rollersad]ustabl v carried on said trunnions for engagirner said grooveswhereby the outer portion of said 10 vane may be adjusted relative tothe Wall of said cylinder.

Y FRANK C. SMITH. Witnesses:

J. W. SHEELEY, IRENE BREEN.

